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karena akar persamaan barunya a + 2 dan b + 2, maka :
3(x - 2)² - 12(x - 2) + 2 = 0
3(x - 2)(x - 2) - 12x + 24 + 2 = 0
3(x² - 4x + 4) - 12x + 26 = 0
3x² - 12x + 12 - 12x + 26 = 0
3x² - 24x + 38 = 0